A boiler condensate recovery and reheating device

Abstract

The utility model belongs to hot water boiler technical field, and disclose a kind of boiler condensate recovery and reheating device, device passes through boiler body, heat recovery device, condensing component, steam direct discharge port, cold water inlet pipe and condensate recovery mixed cavity collaborative operation: high-temperature pressure relief steam enters condensing component through boiler pressure relief pipe, carry out heat exchange with the cold water of condensing coil and heat recovery device inner cold water steam heat exchange chamber, steam radiating condenses, water molecule flows into condensate collection box, heat energy transmission makes cold water temperature rise as warm water, returns boiler body through boiler water inlet pipe, reduce heating energy consumption;Low water content, low-temperature steam after processing is safely discharged through vertical steam direct discharge port. Condensate in condensate collection box is extracted to condensate recovery mixed cavity by liquid pump, and after mixing with cold water, it is used as boiler makeup water recycling. The device realizes the efficient recovery of heat energy and water resources, improves energy utilization and environmental benefits, and is suitable for hot water boiler system.

Description

Technical Field

[0001] This utility model relates to the field of hot water boiler technology, specifically a boiler condensate recovery and reheating device. Background Technology

[0002] In industrial production and residential heating, hot water boilers, as important heat energy conversion equipment, are widely used in various industries such as chemical engineering, power generation, and heating. Their working principle is to heat liquid water to a specified temperature through fuel combustion or electrical energy conversion, providing hot water for production and daily life. However, a long-standing technical problem remains unresolved during the operation of hot water boilers: when hot water is continuously heated, the liquid water inevitably undergoes a phase change, transforming into steam. As steam is continuously generated, the internal pressure of the boiler continues to rise. To ensure the safe operation of the equipment, it is essential to release the excess steam.

[0003] Currently, traditional hot water boilers commonly use the method of directly discharging high-temperature, depressurized steam. While this method can quickly reduce the pressure inside the boiler, it brings a series of serious environmental and energy problems. On the one hand, the direct discharge of high-temperature steam into the atmosphere causes a sharp rise in the surrounding ambient temperature, exacerbating the heat island effect. Furthermore, trace amounts of harmful substances that may be carried in the high-temperature steam can also pollute the atmosphere. On the other hand, the direct discharge of large amounts of high-temperature steam results in a serious waste of water and energy resources. This steam not only contains valuable water resources but also considerable thermal energy. Direct discharge means that a large amount of recyclable resources and energy are wasted, significantly reducing the energy efficiency of the boiler system and increasing the operating costs of enterprises. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a boiler condensate recovery and reheating device, which solves the problems of water and energy waste caused by pressure relief in hot water boilers mentioned in the background.

[0005] (II) Technical Solution To achieve the above-mentioned objectives, this utility model provides the following technical solution: a boiler condensate recovery and reheating device, comprising: The boiler body is a hot water boiler, and a boiler pressure relief pipe is provided on the boiler body. A heat recovery device, which is a horizontal cylindrical shape, with a cold water inlet and a warm water outlet respectively provided on the side end caps on both sides of the heat recovery device; A condensing assembly is disposed inside the heat recovery device and is sealed to the boiler pressure relief pipe; A steam vent is provided at the top of the heat recovery device for discharging treated depressurized steam. A cold water inlet pipe is connected to a water source and is located on one side of the heat recovery device. The cold water inlet pipe is sealed to the cold water inlet on the heat recovery device. The condensate recovery mixing chamber is a square chamber structure and is installed across the cold water inlet pipe.

[0006] Preferably, a boiler inlet pipe is provided on one side of the boiler body, and the boiler inlet pipe is sealed to the warm water output port on the heat recovery device.

[0007] Preferably, the heat recovery device has a cavity structure, and the cavity inside the heat recovery device and the outside of the condensation component together constitute a cold water steam heat exchange chamber.

[0008] Preferably, the condensing assembly includes multiple sets of condensing coils and a condensate collection tank. The multiple sets of condensing coils are arranged at equal intervals, and a condensate collection tank is provided at the bottom of each set of condensing coils. The condensing coils are sealed to the condensate collection tanks, and the multiple sets of condensing coils are interconnected through the condensate collection tanks. One set of condensing coils is sealed to the boiler pressure relief pipe.

[0009] Preferably, a steam output pipe is sealed and connected to a set of condensing coils that are away from the boiler pressure relief pipe, and the steam output pipe extends out to a heat recovery device as a direct steam discharge port.

[0010] Preferably, the steam output pipe is perpendicular to the ground and extends vertically upwards.

[0011] Preferably, a liquid pump is provided on one side of the condensate recovery mixing chamber, the output end of the liquid pump is sealed to the condensate recovery mixing chamber, and a condensate suction pipe is provided at the input end of the liquid pump, which is sealed to the bottom of the condensate collection tank.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a boiler condensate recovery and reheating device, which has the following beneficial effects: 1. This boiler condensate recovery and reheating device is equipped with a heat recovery device, condensation components, and a condensate recovery mixing chamber. It can process the depressurized steam output from the hot water boiler, recover and reuse the heat energy and water resources in the steam. The processed steam has a low water molecule content and low temperature, and can be directly discharged into the atmosphere, resulting in minimal environmental pollution. The device has high energy utilization rate, high water resource utilization rate, is environmentally friendly and practical, and is easy to use.

[0013] 2. Equipped with a heat recovery device, it utilizes the high-temperature steam released from pressure to exchange heat with the cold water entering the boiler, which can slightly raise the temperature of the cold water before it enters the boiler. The boiler heats the water, which saves a lot of energy compared to heating cold water. It can recover the heat energy of the depressurized steam, avoid energy waste, and greatly improve energy utilization. The device is environmentally friendly, energy-saving, and highly practical.

[0014] 3. It is equipped with a condensate recovery mixing chamber, which condenses and collects water molecules in the depressurized steam, mixes them with cold water and then feeds them back into the boiler. This can improve water resource utilization, reduce water waste, and is environmentally friendly with high water resource utilization. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the heat recovery device of this utility model; Figure 4 This is a schematic diagram of the condenser assembly structure of this utility model.

[0016] In the diagram: 1. Boiler body; 2. Heat recovery device; 3. Condensation assembly; 4. Steam direct discharge port; 5. Cold water inlet pipe; 6. Condensate recovery mixing chamber; 7. Boiler pressure relief pipe; 8. Boiler inlet pipe; 9. Cold water steam heat exchange chamber; 10. Condensate coil; 11. Condensate collection tank; 12. Steam output pipe; 13. Liquid pump; 14. Condensate extraction pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 This utility model provides a technical solution: A boiler condensate recovery and reheating device includes: Boiler body 1 is a hot water boiler and is equipped with a boiler pressure relief pipe 7. Steam boilers are used to output high-temperature steam, and their condensate affects production quality. Existing steam boilers are usually equipped with condensate treatment devices, and the amount of condensate is very small, so there is no value in condensate recovery. Therefore, this device is only suitable for hot water boilers.

[0019] Heat recovery device 2 is a horizontal cylindrical shape, and cold water inlet and warm water outlet are respectively provided on the side end caps on both sides of the heat recovery device 2. Condensing component 3 is installed inside the heat recovery device 2 and is sealed to the boiler pressure relief pipe 7. The high-temperature steam released from pressure relief is transported to the condensing component 3, where the steam will condense and recover water resources.

[0020] Steam vent 4 is located at the top of the heat recovery device 2 and is used to discharge the treated depressurized steam. Cold water inlet pipe 5 is connected to a water source. Cold water inlet pipe 5 is located on one side of heat recovery device 2 and is sealed to the cold water inlet on heat recovery device 2. The condensate recovery mixing chamber 6 is a square chamber structure, spanning the cold water inlet pipe 5. The condensate recovery mixing chamber 6 is used to mix condensate into the water source, allowing it to re-enter the production process, thus saving water resources.

[0021] Furthermore, a boiler inlet pipe 8 is provided on one side of the boiler body 1, and the boiler inlet pipe 8 is sealed to the warm water output port on the heat recovery device 2.

[0022] Furthermore, the heat recovery device 2 has a hollow structure, and the hollow cavity inside the heat recovery device 2 and the exterior of the condensing assembly 3 together constitute the cold water steam heat exchange chamber 9. The cold water steam heat exchange chamber 9 is filled with cold water introduced from the water source, and the cold water contacts the condensing assembly 3 to exchange heat with the high-temperature steam inside the condensing assembly 3.

[0023] Furthermore, the condensing assembly 3 includes multiple sets of condensing coils 10 and condensate collection tanks 11. The multiple sets of condensing coils 10 are arranged at equal intervals, and condensate collection tanks 11 are provided at the bottom of the multiple sets of condensing coils 10. The condensing coils 10 and condensate collection tanks 11 are sealed together, and the multiple sets of condensing coils 10 are interconnected through the condensate collection tanks 11. One set of condensing coils 10 is sealed together with the boiler pressure relief pipe 7. The condensing coils 10 are used to increase the contact area between steam and cold water, and the condensed water droplets can flow straight down the inner wall of the condensing coils 10 into the condensate collection tanks 11. The condensate collection tanks 11 below collect and temporarily store condensate, and the condensate level will not submerge the bottom of the condensing coils 10.

[0024] Furthermore, a steam output pipe 12 is sealed and connected to a set of condensing coils 10 away from the boiler pressure relief pipe 7. The steam output pipe 12 extends to the heat recovery device 2 as a steam direct discharge port 4. The pressure relief steam treated by the condensing component 3 has a very low water molecule content and a significantly reduced temperature, causing almost no pollution to the environment. It can be directly discharged into the atmosphere along the steam output pipe 12.

[0025] Furthermore, the steam output pipe 12 is perpendicular to the ground and extends vertically upwards. If the steam output pipe 12 is tilted, it may spray sideways towards people, which is quite dangerous. Extending it vertically upwards effectively improves the safety of the device. The heat recovery device 2 is cylindrical, making it difficult for personnel to climb directly above the steam output pipe 12.

[0026] Furthermore, a liquid pump 13 is installed on one side of the condensate recovery mixing chamber 6. The output end of the liquid pump 13 is sealed to the condensate recovery mixing chamber 6, and the input end of the liquid pump 13 is equipped with a condensate extraction pipe 14, which is sealed to the bottom of the condensate collection tank 11. The liquid pump 13 does not need to be equipped with precise control. The temperature of the steam and the water molecule content in it are almost constant, and the pressure relief during boiler operation is also almost constant. The liquid pump 13 only needs to use a fixed extraction flow rate to ensure stable extraction of condensate from the condensate coil 10. This ensures that there is not too much condensate in the condensate coil 10 and that the pump does not burn out due to excessive extraction. If there are special requirements or the boiler is special, a high-temperature resistant liquid level gauge can be installed in the condensate coil 10, and the liquid level gauge monitoring data can be used to control the start and stop of the liquid pump 13.

[0027] Structural Description: Boiler body 1: The core heat source equipment of the device is a hot water boiler used to heat liquid water. It is equipped with a boiler pressure relief pipe 7, which can discharge the overpressure steam generated by heating. Heat recovery device 2: It is a horizontal cylindrical shape with cold water inlet and warm water outlet on both sides of the sealing plate. The interior is a cavity structure. Together with the outside of the condenser assembly 3, it forms a cold water steam heat exchange chamber 9, which is used to realize the heat exchange between high temperature steam and cold water. Condensing assembly 3: Installed inside the heat recovery device 2, sealed to the boiler pressure relief pipe 7, including multiple sets of equidistantly arranged condensing coils 10 and a condensate collection tank 11 at the bottom. The condensing coils 10 are interconnected and used to condense water molecules in the steam and collect condensate. Steam vent 4: Located at the top of the heat recovery device 2 and connected to the steam output pipe 12, it is used to discharge treated low-moisture, low-temperature steam. Cold water inlet pipe 5: Connects to the water source, is located on one side of the heat recovery device 2, and is sealed to the cold water inlet of the heat recovery device 2 for supplying cold water into the heat recovery device 2; Condensate recovery mixing chamber 6: It is a square chamber structure, spanning the cold water inlet pipe 5, and connected to the condensate collection tank 11 through the liquid pump 13 and condensate extraction pipe 14. It is used to mix condensate and cold water and transport them to the boiler for recycling. Boiler pressure relief pipe 7: installed on the boiler body 1 and sealed to the condensing component 3, used to transport the overpressure high-temperature steam in the boiler body 1 to the condensing component 3; Boiler inlet pipe 8: Located on one side of the boiler body 1, it is sealed to the warm water outlet of the heat recovery device 2 and is used to transport the heated warm water in the heat recovery device 2 back to the boiler body 1. Cold water steam heat exchange chamber 9: It consists of the inner cavity of the heat recovery device 2 and the outside of the condensation component 3, and is filled with cold water. It is used to accommodate the cold water and the high-temperature steam in the condensation component 3 for heat exchange. Condensing coil 10: Multiple sets are arranged at equal intervals and interconnected. The bottom is sealed to the condensate collection tank 11. One set is sealed to the boiler pressure relief pipe 7, and the other set is sealed to the steam output pipe 12. This is used to increase the contact area between steam and cold water and promote condensation and heat exchange. Condensate collection tank 11: Located at the bottom of multiple sets of condenser coils 10, and sealed to the condenser coils 10, it is used to collect and temporarily store the liquid water condensed inside the condenser coils 10; Steam output pipe 12: It is sealed to a set of condensing coils 10 that are away from the boiler pressure relief pipe 7, extends out to the heat recovery device 2 and serves as a steam direct discharge port 4, which is vertically upward and perpendicular to the ground for discharging the treated steam. Liquid pump 13: It is located on one side of the condensate recovery mixing chamber 6, with its output end sealed to the condensate recovery mixing chamber 6 and its input end connected to the bottom of the condensate collection tank 11 through the condensate extraction pipe 14. It is used to extract condensate from the condensate collection tank 11 to the condensate recovery mixing chamber 6. Condensate extraction pipe 14: One end is sealed to the input end of liquid pump 13, and the other end is sealed to the bottom of condensate collection tank 11, used to transfer condensate in condensate collection tank 11 to liquid pump 13.

[0028] Working Principle: The working principle of this boiler condensate recovery and reheating device is based on efficient heat exchange and water resource circulation technology. Through the coordinated operation of various components, it achieves dual recovery and utilization of the heat energy and water resources of the depressurized steam from the hot water boiler. At the beginning of operation, the hot water boiler body 1 generates steam due to the continuous heating of liquid water, causing the internal pressure to rise. At this time, the boiler depressurization pipe 7 transports the overpressured high-temperature steam to the condensation component 3.

[0029] The high-temperature steam entering the condenser assembly 3 first comes into contact with multiple sets of equidistantly arranged condenser coils 10, which are immersed in the cold water-steam heat exchange chamber 9 within the heat recovery device 2. Since the cold water introduced by the heat recovery device 2 through the cold water inlet pipe 5 fills the entire cold water-steam heat exchange chamber 9, a significant temperature difference is created between the high-temperature steam and the low-temperature cold water. This causes the steam to rapidly dissipate heat and cool down on the surface of the condenser coils 10, where water molecules gradually condense into liquid water and flow along the inner wall of the condenser coils 10 into the condensate collection tank 11 at the bottom for temporary storage. Simultaneously, the unique structural design of the condenser coils 10 greatly increases the contact area between the steam and the cold water, enhancing heat exchange efficiency and ensuring that the heat energy in the steam is fully transferred to the cold water.

[0030] During the heat exchange process, cold water absorbs the heat released by high-temperature steam, causing its temperature to rise and transform into warm water. The cold water inlets and warm water outlets on both sides of the heat recovery device 2 form a flow path between cold and warm water. The heated warm water is then transported back to the boiler body 1 through the boiler inlet pipe 8 via the warm water outlet. Compared to directly heating cold water, the energy required for the boiler to heat warm water is significantly reduced, achieving efficient recovery and utilization of high-temperature steam heat energy and significantly improving energy utilization.

[0031] The depressurized steam, after being processed by the condenser assembly 3, has a significantly reduced water content and a noticeably lower temperature, resulting in almost no environmental pollution. This processed steam is safely discharged into the atmosphere through the steam output pipe 12, which is connected to the condenser coil 10 on the side opposite to the boiler depressurization pipe 7, in a direction perpendicular to the ground, via the steam direct discharge port 4. This effectively avoids environmental pollution and safety hazards caused by the direct discharge of high-temperature steam.

[0032] In terms of water resource recovery, the condensate stored in the condensate collection tank 11 is extracted by the liquid pump 13 through the condensate extraction pipe 14. Since the pressure relief and steam composition of the hot water boiler are relatively stable during operation, the liquid pump 13 can achieve stable operation with a fixed extraction flow rate, ensuring that the condensate in the condensate coil 10 does not accumulate excessively or that the pump burns out. The extracted condensate is transported to the condensate recovery mixing chamber 6, which spans the cold water inlet pipe 5. Here, the condensate is thoroughly mixed with the water source introduced through the cold water inlet pipe 5, and then re-enters the hot water boiler as boiler makeup water to participate in the circulation, forming a closed-loop utilization of water resources. This greatly improves the utilization rate of water resources and reduces the consumption of fresh water resources. Through the above complete processing flow, the device achieves efficient recovery of the heat energy and water resources from the pressure relief steam of the hot water boiler, effectively solving the energy waste and environmental pollution problems caused by the discharge of pressure relief steam from traditional hot water boilers.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler condensate recovery and reheating device, characterized in that, include: Boiler body (1), the boiler body (1) is a hot water boiler, and a boiler pressure relief pipe (7) is provided on the boiler body (1). Heat recovery device (2), the heat recovery device (2) is a horizontal cylindrical shape, and cold water inlet and warm water outlet are respectively provided on the side end caps on both sides of the heat recovery device (2); Condensing assembly (3), the condensing assembly (3) is disposed inside the heat recovery device (2), and the condensing assembly (3) is sealed to the boiler pressure relief pipe (7); Steam vent (4), which is located on top of the heat recovery device (2), is used to discharge the depressurized steam after treatment; Cold water inlet pipe (5), the cold water inlet pipe (5) is connected to the water source, the cold water inlet pipe (5) is set on one side of the heat recovery device (2), and the cold water inlet pipe (5) is sealed to the cold water inlet on the heat recovery device (2); The condensate recovery mixing chamber (6) is a square chamber structure and is installed across the cold water inlet pipe (5).

2. The boiler condensate recovery and reheating device according to claim 1, characterized in that: A boiler inlet pipe (8) is provided on one side of the boiler body (1), and the boiler inlet pipe (8) is sealed to the warm water outlet of the heat recovery device (2).

3. The boiler condensate recovery and reheating device according to claim 1, characterized in that: The heat recovery device (2) has a cavity structure. The cavity inside the heat recovery device (2) and the outside of the condensation component (3) together form a cold water steam heat exchange chamber (9).

4. The boiler condensate recovery and reheating device according to claim 1, characterized in that: The condensing assembly (3) includes multiple sets of condensing coils (10) and a condensate collection tank (11). The multiple sets of condensing coils (10) are arranged at equal intervals. A condensate collection tank (11) is provided at the bottom of the multiple sets of condensing coils (10). The condensing coils (10) and the condensate collection tank (11) are sealed together. The multiple sets of condensing coils (10) are interconnected through the condensate collection tank (11). One set of condensing coils (10) is sealed together with the boiler pressure relief pipe (7).

5. A boiler condensate recovery and reheating device according to claim 4, characterized in that: A steam output pipe (12) is sealed and connected to a set of condensing coils (10) away from the boiler pressure relief pipe (7). The steam output pipe (12) extends out to the heat recovery device (2) as a steam direct discharge port (4).

6. A boiler condensate recovery and reheating device according to claim 5, characterized in that: The steam output pipe (12) is perpendicular to the ground and rises vertically.

7. A boiler condensate recovery and reheating device according to claim 4, characterized in that: A liquid pump (13) is provided on one side of the condensate recovery mixing chamber (6). The output end of the liquid pump (13) is sealed to the condensate recovery mixing chamber (6). A condensate suction pipe (14) is provided at the input end of the liquid pump (13). The condensate suction pipe (14) is sealed to the bottom of the condensate collection tank (11).

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